243132212540 has 48 divisors (see below), whose sum is σ = 586134054912. Its totient is φ = 82985795136.

The previous prime is 243132212461. The next prime is 243132212563. The reversal of 243132212540 is 45212231342.

It is a super-2 number, since 2×243132212540² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3862634 + ... + 3925073.

It is an arithmetic number, because the mean of its divisors is an integer number (12211126144).

Almost surely, 2^243132212540 is an apocalyptic number.

243132212540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243132212540 is an abundant number, since it is smaller than the sum of its proper divisors (343001842372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243132212540 is a wasteful number, since it uses less digits than its factorization.

243132212540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7787946 (or 7787944 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 243132212540 its reverse (45212231342), we get a palindrome (288344443882).

The spelling of 243132212540 in words is "two hundred forty-three billion, one hundred thirty-two million, two hundred twelve thousand, five hundred forty".